From: Magnus Damm <damm+rene...@opensource.se>
The r8a7795 IPMMU supports 40-bit bus mastering. Both
the coherent DMA mask and the streaming DMA mask are
set to unlock the 40-bit address space for coherent
allocations and streaming operations.
Signed-off-by: Magnus Damm <damm+rene...@opensource.se>
---
Changes since V2:
- Updated the code and commit message to use 40 bits instead of 64 bits
Changes since V1:
- Updated the commit message
drivers/iommu/ipmmu-vmsa.c | 1 +
1 file changed, 1 insertion(+)
--- 0016/drivers/iommu/ipmmu-vmsa.c
+++ work/drivers/iommu/ipmmu-vmsa.c 2017-03-08 18:29:56.390607110 +0900
@@ -1103,6 +1103,7 @@ static int ipmmu_probe(struct platform_d
spin_lock_init(&mmu->lock);
bitmap_zero(mmu->ctx, IPMMU_CTX_MAX);
mmu->features = match->data;
+ dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
/* Map I/O memory and request IRQ. */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
